US3248395A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-amino-5, 6, 7, 8-tetrahydro-pyrido-[4, 3-d]-pyrimidine substitution products
Assignee: C.H. Boehringer Sohn AG and Co KG
•
Filing: 1963-03-14
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Granted: 1966-04-26
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Expires: 1983-03-14
Abstract
No abstract record available.
Inventors
- 👤 Ohnacker Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:28
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 4-AMINO-5,6,7,8-TETRAHYDRO-PYRIDO - (4,3-D)-PYRIMIDINES OF THE FORMULA
Claim 2
Dependent Claim
14 words
A COMPOUND SELECTED FROM THE GROUP CONSISTING OF 4-AMINO-5,6,7,8-TETRAHYDRO-PYRIDO - (4,3-D)-PYRIMIDINES OF THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |